It still can be a hit or miss now days though enles you get deep into the specs of your head unit and speakers, kind of like with my subwoofers, yes I can run my jl 13w7 off any amp but for it to run properly I need to run it off a jl 1000/1 or a 1000/1v2, it goes the same with your head unit, a speaker company makes their speakers to match specs to their head units or certain off branched sister companies, I am not the biggest expert in speakers so I can't tell you what all the specs mean, wish I could